| Message ID | 20241206215318.3402860-1-zmw12306@gmail.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [v3] pwm: stm32-lp: Add check for clk_enable() | expand |
Hello, On Fri, Dec 06, 2024 at 04:53:18PM -0500, Mingwei Zheng wrote: > Changelog: > > v2 -> v3: > > 1. Add tool name in the commit log. Thanks. Applied to https://git.kernel.org/pub/scm/linux/kernel/git/ukleinek/linux.git pwm/for-next . Best regards Uwe
diff --git a/drivers/pwm/pwm-stm32-lp.c b/drivers/pwm/pwm-stm32-lp.c index 989731256f50..f09d097d6284 100644 --- a/drivers/pwm/pwm-stm32-lp.c +++ b/drivers/pwm/pwm-stm32-lp.c @@ -167,8 +167,12 @@ static int stm32_pwm_lp_get_state(struct pwm_chip *chip, regmap_read(priv->regmap, STM32_LPTIM_CR, &val); state->enabled = !!FIELD_GET(STM32_LPTIM_ENABLE, val); /* Keep PWM counter clock refcount in sync with PWM initial state */ - if (state->enabled) - clk_enable(priv->clk); + if (state->enabled) { + int ret = clk_enable(priv->clk); + + if (ret) + return ret; + } regmap_read(priv->regmap, STM32_LPTIM_CFGR, &val); presc = FIELD_GET(STM32_LPTIM_PRESC, val);
Add check for the return value of clk_enable() to catch the potential error. We used APP-Miner to find it. Fixes: e70a540b4e02 ("pwm: Add STM32 LPTimer PWM driver") Signed-off-by: Mingwei Zheng <zmw12306@gmail.com> Signed-off-by: Jiasheng Jiang <jiashengjiangcool@gmail.com> --- Changelog: v2 -> v3: 1. Add tool name in the commit log. v1 -> v2: 1. Move int ret declaration into if block. --- drivers/pwm/pwm-stm32-lp.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)